Page 302 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

MODULE 17: CRDI System

EXERCISE 17.1: Servicing of CRDI low pressure fuel

supply circuit

Objectives

At the end of this exercise you shall be able to
• servicing of fuel tank
• servicing of low pressure fuel pump
• servicing of fuel filter
• checking of fuel level sensor and fuel water sensor
• checking of fuel leakage.

Requirements

Tools/Instruments Materials
• Trainee’s toolkit - 1 No. • Tray - as reqd.
• Multi meter - 1 No. • Cottoncloth - as reqd.
• Kerosene - as reqd.
Equipments • Fuel pipe line and Hoses - as reqd.
• A LMV with CRDI engine - 1 No. • Diesel - as reqd.
• Two post lift - 1 No. • Fuel filter - 1 No.
• Hand operated pump - 1 No.
• Telescopic jack stand - 1 No.
Procedure

TASK 1: Servicing of fuel tank

1 Disconnect the battery negative cable
2 Remove fuel filler cap
3 Connect a hand operated pump hose on fuel filler hose and drain fuel level till just above the fuel tank filler
inlet valve
4 Lift the vehicle. Remove clamp, fuel filler hose and breather hose from fuel tank
5 Remove the exhaust pipe
6 Drain the fuel by opening the drain plug. If drain plug is not provided, drain the fuel by using hand operated
pump through fuel tank filler.
7 Disconnect the hoses connected to fuel tank.
8 Remove the mounting bolts of fuel tank after proper support is provided.
9 Lower down the fuel tank to provide sufficient space for disconnecting the fuel pipe lines.
10 Loosen the hose clamp and Disconnect the fuel pipe hose connected to the fuel tank return line.

11 Loosen the hose clamp and Disconnect the fuel pipe line connected to the fuel rail at Fuel pressure regulator
end.
12 Disconnect the fuel pipe line quick joint connected to the fuel filter inlet by pushing the lock button.

13 Disconnect the fuel pipe line quick joint connected to the fuel filter inlet by pushing the lock button.
14 Disconnect the fuel pump and fuel level float wiring harness connector.
15 Remove fuel tank from vehicle.
16 Remove all hoses, pipes and Fuel pump assembly.

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CITS : Automotive - Mechanic Diesel - Exercise 16.3